2-232335804-A-G

Position:

• chr2-232335804-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_152383.5(DIS3L2):​c.2426A>G​(p.Lys809Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: DIS3L2 NM_152383.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.66

Genes affected

DIS3L2 (HGNC:28648): (DIS3 like 3'-5' exoribonuclease 2) The protein encoded by this gene is similar in sequence to 3'/5' exonucleolytic subunits of the RNA exosome. The exosome is a large multimeric ribonucleotide complex responsible for degrading various RNA substrates. Several transcript variants, some protein-coding and some not, have been found for this gene. [provided by RefSeq, Mar 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1195268).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DIS3L2	NM_152383.5	c.2426A>G	p.Lys809Arg	missense_variant	20/21	ENST00000325385.12	NP_689596.4
DIS3L2	NM_001257281.2	c.1582-7541A>G		intron_variant			NP_001244210.1
DIS3L2	NR_046476.2	n.2499A>G		non_coding_transcript_exon_variant	20/21
DIS3L2	NR_046477.2	n.2478A>G		non_coding_transcript_exon_variant	19/19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DIS3L2	ENST00000325385.12	c.2426A>G	p.Lys809Arg	missense_variant	20/21	5	NM_152383.5	ENSP00000315569	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Perlman syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 13, 2022

This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 809 of the DIS3L2 protein (p.Lys809Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with DIS3L2-related conditions. ClinVar contains an entry for this variant (Variation ID: 463107). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt DIS3L2 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0094	T;T;.
Eigen	Benign	0.013
Eigen_PC	Benign	0.027
FATHMM_MKL	Benign	0.57	D
LIST_S2	Benign	0.78	T;.;T
M_CAP	Benign	0.0089	T
MetaRNN	Benign	0.12	T;T;T
MetaSVM	Benign	-0.89	T
MutationAssessor	Uncertain	2.0	M;M;.
MutationTaster	Benign	1.0	D;N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-0.94	N;N;D
REVEL	Benign	0.029
Sift	Benign	0.27	T;T;T
Sift4G	Benign	0.37	T;T;D
Polyphen		0.0	B;B;.
Vest4		0.11
MutPred		0.34		Loss of methylation at K809 (P = 0.0077);Loss of methylation at K809 (P = 0.0077);.;
MVP		0.068
MPC		0.18
ClinPred		0.36	T
GERP RS		1.5
Varity_R		0.065
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs775531488; hg19: chr2-233200514;